722936520 has 96 divisors (see below), whose sum is σ = 2381815800. Its totient is φ = 190135296.

The previous prime is 722936519. The next prime is 722936549. The reversal of 722936520 is 25639227.

It can be written as a sum of positive squares in 4 ways, for example, as 417875364 + 305061156 = 20442^2 + 17466^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12526 + ... + 40034.

Almost surely, 2^722936520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722936520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190907900).

722936520 is an abundant number, since it is smaller than the sum of its proper divisors (1658879280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722936520 is a wasteful number, since it uses less digits than its factorization.

722936520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27599 (or 27592 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 722936520 is about 26887.4788702846. The cubic root of 722936520 is about 897.4977904628.

The spelling of 722936520 in words is "seven hundred twenty-two million, nine hundred thirty-six thousand, five hundred twenty".